COMPUTER SYSTEMS

A computer system is defined as combination of components designed to process data and store files.Consists of four major hardware components ; input devices, output devices, processor and storage devices.Requires hardware, software and a user to fully function.

Software refers to set of instructions that tell the hardware what to do.Software also have various functions such performing computation, communication with other software and human interaction.User refer to a person who uses the computer for any purpose such as work, business and entertainment.

COMPUTER SYSTEMS

COMPUTER HARDWARE

BLOCK DIAGRAM

PROCESS

INPUT OUTPUT

STORAGE

STORAGE

PRIMARY STORAGE

SECONDARY

STORAGE

ROM ( Read Only Memory )

RAM ( Random Access Memory )

CPU – CENTRAL PROCESSING UNIT

Two typical components of a CPU are the arithmetic logic unit (ALU), which performs arithmetic and logical operations, and the control unit (CU), which extracts instructions from memory and decodes and executes them, calling on the ALU